Question 1

Compared to a combustion reaction (explosion or fire), rusting is:

Accepted Answer

a slow reaction

Answer

the same rate of reaction

Answer

a fast reaction

Question 2

What is meant by the word 'corrosion'?

Accepted Answer

A reaction when substances 'eat away' at another substance.

Answer

A reaction that is fast and explosive.

Answer

A reaction when substances combines to make them stronger.

Question 3

Salt acts like a catalyst for rusting because it:

Accepted Answer

speeds up the reaction but is not used up

Answer

slows down the reaction and is used up

Answer

slows down the reaction but is not used up

Answer

speeds up the reaction and is used up

Question 4

What are the two main reactants that combine with iron to produce rust?

Accepted Answer

water and oxygen

Answer

salt and oxygen

Answer

water and salt

Question 5

The rusting reaction of iron can be represented by which word equation?

Accepted Answer

iron + water + oxygen --> rust

Answer

iron + rust --> water + oxygen

Answer

rust --> iron + water + oxygen

Question 6

What is one way to protect iron from rusting?

Accepted Answer

Coating it in a more reactive metal like zinc

Answer

Spraying it with salt water

Answer

Heating up the iron

Answer

Coating it in a less reactive metal like copper

Question 7

Rusting will slow down when you put iron in a:

Accepted Answer

Dry environment

Answer

Salty environment

Answer

Wet environment

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